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Known Exploited Vulnerability
9.2
CRITICAL CVSS 4.0
CVE-2025-34026
Versa Concerto Improper Authentication Vulnerability - [Actively Exploited]
Description

The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing at attacker to access administrative endpoints. The internal Actuator endpoint can be leveraged for access to heap dumps and trace logs.This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.

INFO

Published Date :

May 21, 2025, 10:15 p.m.

Last Modified :

Jan. 23, 2026, 6:39 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Versa Concerto SD-WAN orchestration platform contains an improper authentication vulnerability in the Traefik reverse proxy configuration, allowing at attacker to access administrative endpoints. The internal Actuator endpoint can be leveraged for access to heap dumps and trace logs.

Required Action :

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes :

https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e ; https://nvd.nist.gov/vuln/detail/CVE-2025-34026

Affected Products

The following products are affected by CVE-2025-34026 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Versa concerto
1 Versa-networks concerto
: Total Affected Vendor : 2 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
CVSS 4.0 CRITICAL [email protected]
Solution
Address authentication bypass by updating Traefik and securing administrative endpoints.
  • Update Traefik to the latest secure version.
  • Review and harden proxy configurations.
  • Restrict access to administrative endpoints.
  • Apply vendor-provided security patches.
Public PoC/Exploit Available at Github

CVE-2025-34026 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-34026.

URL Resource
https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce Exploit Mitigation Third Party Advisory
https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce Exploit Mitigation Third Party Advisory
https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-34026 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-34026 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
Hunt3r850/CiberScan-Tool

Herramienta automatizada de ciberseguridad para escaneo de redes y detección de vulnerabilidades

Python Shell

Updated: 6 days, 1 hour ago
0 stars 0 fork 0 watcher
Born at : June 6, 2025, 6:23 p.m. This repo has been linked 5 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-34026 vulnerability anywhere in the article.

  • TheCyberThrone
CISA KEV Alert: 5 Critical Vulnerabilities Added to Catalog

January 24, 2026As a cybersecurity analyst tracking threat intelligence, In a rapid-fire update, CISA added four flaws on January 22 and one on January 23, 2026, confirming active exploitation across ... Read more

Published Date: Jan 24, 2026 (2 weeks, 6 days ago)
  • The Cyber Express
CISA Adds Five Enterprise Software Flaws to Known Exploited Vulnerabilities Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added five enterprise software flaws to its Known Exploited Vulnerabilities (KEV) Catalog in an 18-hour span. On January 22, CISA a ... Read more

Published Date: Jan 23, 2026 (2 weeks, 6 days ago)
  • BleepingComputer
CISA confirms active exploitation of four enterprise software bugs

The Cybersecurity and Infrastructure Security Agency (CISA) in the U.S. warned of active exploitation of four vulnerabilities impacting enterprise software from Versa and Zimbra, the Vite frontend too ... Read more

Published Date: Jan 23, 2026 (3 weeks ago)
  • The Hacker News
CISA Updates KEV Catalog with Four Actively Exploited Software Vulnerabilities

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added four security flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation in t ... Read more

Published Date: Jan 23, 2026 (3 weeks ago)
  • security.nl
VS meldt misbruik van lekken in Zimbra, Versa Concerto en Vite

Aanvallers maken actief misbruik van relatief nieuwe kwetsbaarheden in Zimbra, Versa Concerto en Vite, zo waarschuwt het Amerikaanse cyberagentschap CISA. Misbruik van deze lekken was nog niet bekend. ... Read more

Published Date: Jan 23, 2026 (3 weeks ago)
  • Daily CyberSecurity
CISA Adds 4 Critical Flaws to “Must-Patch” List as Exploits Surge

The Cybersecurity and Infrastructure Security Agency (CISA) has updated its Known Exploited Vulnerabilities (KEV) Catalog with four dangerous new entries, signaling that hackers are actively weaponizi ... Read more

Published Date: Jan 23, 2026 (3 weeks ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-34026 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jan. 23, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Added CPE Configuration OR *cpe:2.3:a:versa-networks:concerto:*:*:*:*:*:*:*:* versions from (including) 11.4.0 up to (excluding) 12.1.2 *cpe:2.3:a:versa-networks:concerto:12.1.2:-:*:*:*:*:*:* *cpe:2.3:a:versa-networks:concerto:12.2.0:*:*:*:*:*:*:*
    Added Reference Type VulnCheck: https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce Types: Exploit, Mitigation, Third Party Advisory
    Added Reference Type CISA-ADP: https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce Types: Exploit, Mitigation, Third Party Advisory
    Added Reference Type CISA-ADP: https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e Types: Vendor Advisory
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jan. 23, 2026

    Action Type Old Value New Value
    Added Reference https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jan. 22, 2026

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34026
  • CVE Modified by [email protected]

    Sep. 23, 2025

    Action Type Old Value New Value
    Added CWE CWE-288
    Removed CWE CWE-287
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    May. 22, 2025

    Action Type Old Value New Value
    Added Reference https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce
  • New CVE Received by [email protected]

    May. 21, 2025

    Action Type Old Value New Value
    Added Description The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing at attacker to access administrative endpoints. The internal Actuator endpoint can be leveraged for access to heap dumps and trace logs.This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.
    Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-287
    Added Reference https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.2
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact